WO2020220723A1 - Dispositif de sortie acoustique - Google Patents

Dispositif de sortie acoustique Download PDF

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Publication number
WO2020220723A1
WO2020220723A1 PCT/CN2019/130942 CN2019130942W WO2020220723A1 WO 2020220723 A1 WO2020220723 A1 WO 2020220723A1 CN 2019130942 W CN2019130942 W CN 2019130942W WO 2020220723 A1 WO2020220723 A1 WO 2020220723A1
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WO
WIPO (PCT)
Prior art keywords
sound
sound guide
guide holes
acoustic
output device
Prior art date
Application number
PCT/CN2019/130942
Other languages
English (en)
Chinese (zh)
Inventor
张磊
付峻江
闫冰岩
廖风云
齐心
Original Assignee
深圳市韶音科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市韶音科技有限公司 filed Critical 深圳市韶音科技有限公司
Publication of WO2020220723A1 publication Critical patent/WO2020220723A1/fr
Priority to US17/320,259 priority Critical patent/US11457301B2/en
Priority to US17/931,082 priority patent/US11671738B2/en
Priority to US18/314,170 priority patent/US20230276161A1/en

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    • H04S7/30—Control circuits for electronic adaptation of the sound field
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    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
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    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13—Hearing devices using bone conduction transducers
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    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
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    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field

Definitions

  • This application relates to the field of acoustics, in particular to an acoustic output device.
  • the open binaural acoustic output device is a portable audio output device that realizes sound conduction in a specific range. Compared with traditional in-ear and over-ear headphones, the open binaural acoustic output device has the characteristics of not blocking or covering the ear canal, allowing users to listen to music while acquiring sound information in the external environment, improving safety Sex and comfort. Due to the use of an open structure, the sound leakage of an open binaural acoustic output device is often more serious than that of a traditional earphone. At present, the common practice in the industry is to use two or more sound sources to construct a specific sound field and adjust the sound pressure distribution to reduce sound leakage.
  • this method can achieve the effect of reducing sound leakage to a certain extent, it still has certain limitations. For example, this method reduces the volume of the sound sent to the user while suppressing leakage. Moreover, due to the different wavelengths of sounds at different frequencies, this method has a poor suppression effect on high-frequency leakage.
  • an acoustic output device which includes at least one acoustic driver, and outputs the sound emitted by the at least one acoustic driver from at least two sound guide holes. Further, the device further includes a controller configured to control the phase and amplitude of each of the at least one acoustic driver, and the controller causes the at least one acoustic driver to pass from the at least two sound guide holes through a control signal. Output sounds with opposite phases.
  • the device further includes a supporting structure, the supporting structure is provided with at least one baffle, the supporting structure is configured to carry the at least one acoustic driver, and the at least two sound guide holes are respectively located at the Said at least one baffle on both sides.
  • the at least one acoustic driver includes a diaphragm, and an antechamber for radiating sound is provided on the support structure on the front side of the diaphragm, and the support structure is located on the front side of the diaphragm.
  • the rear side is provided with a rear chamber for radiating sound, the front chamber is acoustically coupled with one of the at least two sound guide holes, and the rear chamber is connected to the other of the at least two sound guide holes Acoustic coupling of sound guide holes.
  • the sound path of the diaphragm to the at least two sound guide holes is different.
  • the sound path ratio from the diaphragm to the at least two sound guide holes is 0.5-2.
  • the sound generated by the at least one acoustic driver at the at least two sound guide holes has different sound pressure amplitudes.
  • the at least one acoustic driver includes a first acoustic driver and a second acoustic driver
  • the controller makes the first acoustic driver and the second acoustic driver output from the at least two acoustic guide holes through a control signal Opposite sound.
  • the sound paths of the first acoustic driver and the second acoustic driver to the at least two sound guide holes are different.
  • the sound path ratio of the first acoustic driver and the second acoustic driver to the at least two sound guide holes is 0.5-2.
  • the sound produced by the first acoustic driver at one of the at least two sound guide holes is the same as the sound produced by the second acoustic driver at the other of the at least two sound guide holes.
  • the sound produced at the hole has different sound pressure amplitudes.
  • the distance d between at least two sound guide holes is not greater than 12 cm.
  • the at least two sound guide holes include a first sound guide hole and a second sound guide hole, the first sound guide hole and the user's ear are located on one side of the baffle, and the second sound guide hole The hole is located on the other side of the baffle, and the sound path from the first sound guide hole to the user's ear is smaller than the sound path from the second sound guide hole to the user's ear.
  • the at least two sound guide holes are located on the same side of the user’s ears, and the distance from the sound guide hole close to the user’s ear to the user’s ear among the at least two sound guide holes is greater than that of the at least two sound guide holes.
  • the ratio of the distance between the two is not more than 3.
  • the at least two sound guide holes are located on the same side of the user’s ears, and the distance from the sound guide hole close to the user’s ear to the user’s ear among the at least two sound guide holes is greater than that of the at least two sound guide holes.
  • the ratio of the spacing between the two is not greater than 1.
  • the at least two sound guide holes are located on the same side of the user’s ears, and the distance from the sound guide hole close to the user’s ear to the user’s ear among the at least two sound guide holes is greater than that of the at least two sound guide holes.
  • the ratio of the distance between the two is not more than 0.9.
  • the ratio of the height of the baffle to the distance between the at least two sound guide holes is not greater than one.
  • the ratio of the distance from the center of the baffle to the connecting line of the at least two sound guide holes to the height of the baffle is not greater than 2.
  • the at least two sound guide holes include a third sound guide hole and a fourth sound guide hole, and the ratio of the distance from the third sound guide hole to the baffle to the distance from the fourth sound guide hole to the baffle is not Greater than 2/3.
  • an acoustic output device which may include at least one acoustic driver, and the at least one acoustic driver outputs sound from at least two sound guide holes. Further, the device may further include a controller configured to control the phase and amplitude of each of the at least one acoustic driver, and the controller causes the at least one acoustic driver to conduct sound from the at least two acoustic drivers through a control signal.
  • the holes output sounds in opposite phases.
  • the device may further include a supporting structure suitable for being worn on the user's body, and the supporting structure is configured to carry the at least one acoustic driver so that the at least two sound guide holes are respectively located on two sides of the user's auricle. side.
  • the at least one acoustic driver includes a diaphragm, and an antechamber for radiating sound is provided on the support structure on the front side of the diaphragm, and the support structure is on the back side of the diaphragm.
  • a rear chamber for radiating sound is provided, the front chamber is acoustically coupled with one of the at least two sound guide holes, and the rear chamber is acoustically coupled with the other of the at least two sound guide holes Hole acoustic coupling.
  • the sound path of the diaphragm to the at least two sound guide holes is different.
  • the sound path ratio from the diaphragm to the at least two sound guide holes is 0.5-2.
  • the sound generated by the at least one acoustic driver at the at least two sound guide holes has different sound pressure amplitudes.
  • the at least one acoustic driver includes a first acoustic driver and a second acoustic driver
  • the controller causes the first acoustic driver and the second acoustic driver to conduct sound from the at least two acoustic drivers through a control signal.
  • the holes output sounds in opposite phases.
  • the sound paths of the first acoustic driver and the second acoustic driver to the at least two sound guide holes are different.
  • the sound path ratio of the first acoustic driver and the second acoustic driver to the at least two sound guide holes is 0.5-2.
  • the sound generated by the first acoustic driver at one of the at least two sound guide holes is the same as the sound generated by the second acoustic driver at the other of the at least two sound guide holes.
  • the sound produced at the sound guide hole has different sound pressure amplitudes.
  • the distance d between at least two sound guide holes is between 1 cm and 12 cm.
  • the at least two sound guide holes include two sound guide holes respectively located at the front and rear sides of the user's auricle, wherein the sound guide hole on the front side of the auricle is shorter than the acoustic path of the user's ear. The acoustic path of the sound guide hole on the back of the auricle from the user’s ear.
  • Fig. 1 is an exemplary structural diagram of an acoustic output device according to some embodiments of the present application
  • Fig. 2 is a schematic structural diagram of another acoustic output device according to some embodiments of the present application.
  • Fig. 3 is a schematic structural diagram of yet another acoustic output device provided according to some embodiments of the present application.
  • Fig. 4 is a schematic diagram of two dual-point sound sources and listening positions provided according to some embodiments of the present application.
  • Fig. 5 is a schematic diagram of two point sound sources and listening positions provided according to some embodiments of the present application.
  • Fig. 6 is a frequency response characteristic curve of two-point sound sources with different spacings in a near-field listening position according to some embodiments of the present application;
  • FIG. 7 is a diagram of the leakage index of two-point sound sources with different spacings in the far field according to some embodiments of the present application.
  • FIG. 8 is a schematic diagram of an exemplary distribution of baffles provided between two-point sound sources according to some embodiments of the present application.
  • Fig. 9 is a near-field frequency response characteristic curve when the auricle is located between two-point sound sources according to some embodiments of the present application.
  • Fig. 10 is a far-field frequency response characteristic curve when the auricle is located between two-point sound sources according to some embodiments of the present application;
  • FIG. 11 is a frequency response leakage index curve of the acoustic output device according to some embodiments of the present application when the two-point sound source is distributed on both sides of the auricle;
  • FIG. 12 is a schematic diagram of measurement of sound leakage index according to some embodiments of the present application.
  • FIG. 13 is a graph of frequency response between two point sound sources provided with and without a baffle according to some embodiments of the present application.
  • 15 is a near-field frequency response characteristic curve when the distance d between two-point sound sources is 2 cm according to some embodiments of the present application;
  • Fig. 16 is a near-field frequency response characteristic curve when the distance d between two-point sound sources is 4 cm according to some embodiments of the present application;
  • Fig. 17 is a far-field sound leakage index curve when the distance d between two-point sound sources is 1 cm according to some embodiments of the present application;
  • Fig. 18 is a far-field sound leakage index curve when the distance d between two-point sound sources is 2 cm according to some embodiments of the present application;
  • Fig. 19 is a far-field sound leakage index curve when the distance d between two-point sound sources is 4 cm according to some embodiments of the present application;
  • 21 is a graph showing the frequency response characteristics of a double-point sound source without a baffle provided in different listening positions in the near field according to some embodiments of the present application;
  • FIG. 22 is a diagram of the leakage index of a two-point sound source without a baffle provided in different listening positions according to some embodiments of the present application.
  • FIG. 23 is a graph showing the frequency response characteristics of a baffled two-point sound source at different listening positions in the near field according to some embodiments of the present application.
  • FIG. 24 is a diagram of the leakage index of a double-point sound source with a baffle provided in different listening positions according to some embodiments of the present application.
  • FIG. 25 is a schematic diagram of an exemplary distribution of dual-point sound sources and baffles according to some embodiments of the present application.
  • FIG. 26 is a frequency response characteristic curve of the near field when the baffle provided according to some embodiments of the present application is at different positions;
  • Figure 27 is a far-field frequency response characteristic curve of the baffle provided in different positions according to some embodiments of the present application.
  • FIG. 28 is a diagram of the sound leakage index of the baffle provided in different positions according to some embodiments of the present application.
  • FIG. 29 is a frequency response characteristic curve of the near field of a two-point sound source when baffles of different heights are selected in the structure shown in FIG. 25;
  • FIG. 30 is the frequency response characteristic curve of the far field of the two-point sound source when baffles of different heights are selected in the structure shown in FIG. 25;
  • Fig. 31 is a diagram showing the leakage index of the two-point sound source when baffles of different heights are selected in the structure shown in Fig. 25;
  • Fig. 32 is the frequency response characteristic curve of the near field of the double-point sound source when the ratio of the distance from the center of the baffle to the connecting line of the double-point sound source and the height of the baffle takes different values in the structure of Fig. 25;
  • FIG. 34 is a diagram of the sound leakage index when the ratio of the distance from the center of the baffle to the line of the two-point sound source and the height of the baffle takes different values in the structure of FIG. 25;
  • 35 is a schematic diagram of an exemplary structure of an acoustic output device according to some embodiments of the present application.
  • FIG. 36 is a schematic diagram of the distribution of point sound sources and baffles according to some embodiments of the present application.
  • Fig. 37 is the frequency response characteristic curve of the near field and the far field with and without baffles between the multi-point sound sources shown in Fig. 36;
  • FIG. 38 is a diagram showing the sound leakage index when a baffle is installed and not installed between multiple point sound sources shown in FIG. 36;
  • Fig. 39 is a diagram of the leakage index corresponding to the two multi-point sound source distribution modes shown in Fig. 36 (a) and (b);
  • Fig. 40 is a schematic structural diagram of another acoustic output device according to some embodiments of the present application.
  • FIG. 41 is a diagram of the leakage index under the combined action of a low-frequency two-point sound source and a high-frequency two-point sound source provided according to some embodiments of the present application.
  • FIG. 42 is a schematic diagram of a mobile phone with sound guide holes according to some embodiments of the present application.
  • system is a method for distinguishing different components, elements, parts, parts, or assemblies of different levels.
  • the words can be replaced by other expressions.
  • a flowchart is used in this application to illustrate the operations performed by the system according to the embodiments of the application. It should be understood that the preceding or following operations are not necessarily performed exactly in order. Instead, the steps can be processed in reverse order or simultaneously. At the same time, you can also add other operations to these processes, or remove a step or several operations from these processes.
  • This specification describes an acoustic output device including at least one set of acoustic drivers.
  • the acoustic output device When the user wears the acoustic output device, the acoustic output device is located at least on the side of the user's head, close to but not blocking the user's ears.
  • the acoustic output device can be worn on the user's head (for example, non-in-ear open earphones worn with glasses, headbands or other structures), or on other parts of the user's body (for example, the user's neck/shoulder) Area), or placed near the user’s ears by other means (for example, the way the user holds them by hand).
  • the sound generated by at least one set of acoustic drivers in the acoustic output device can be propagated outward through the two acoustically coupled sound guide holes.
  • the two sound guide holes can respectively propagate sounds with the same (or approximately the same) amplitude and opposite (or approximately opposite) phases.
  • the two sound guide holes may be distributed on both sides of the user's auricle.
  • the auricle serves as a baffle to separate the two sound guide holes, so that the two sound guide holes There are different acoustic paths to the user's ear canal.
  • a baffle structure may be provided on the acoustic output device, so that two sound guide holes are respectively distributed on both sides of the baffle.
  • distributing the two sound guide holes on both sides of the auricle or baffle can increase the sound path difference between the two sound guide holes to transmit sound to the user’s ears (that is, the sound from the two sound guide holes reaches the user’s ear canal).
  • the distance difference makes the sound cancellation effect weaker, thereby increasing the volume of the sound (also called near-field sound) heard by the user's ears, thereby providing the user with a better listening experience.
  • the auricle or baffle has little effect on the sound transmission of the sound guide hole to the environment (also called far-field sound).
  • Fig. 1 is an exemplary structural diagram of an acoustic output device according to some embodiments of the present application.
  • the acoustic output device 100 may include a supporting structure 110 and an acoustic driver 120 and a controller (not shown in FIG. 1) disposed in the supporting structure.
  • the acoustic output device 100 can be worn on the user's body (for example, the head, neck or upper torso of the human body) through the support structure 110, while the support structure 110 and the acoustic driver 120 can be close to but not block the ear canal , So that the user's ears are kept open, and the user can not only hear the sound output by the acoustic output device 100, but also obtain the sound of the external environment.
  • the acoustic output device 100 can be arranged around or partly around the circumference of the user's ear, and can transmit sound through air conduction or bone conduction.
  • the support structure 110 may be used to be worn on the user's body, and may carry one or more acoustic drivers 120.
  • the supporting structure 110 may be a closed shell structure with a hollow inside, and the one or more acoustic drivers 120 are located inside the supporting structure 110.
  • the acoustic output device 100 can be combined with glasses, headsets, head-mounted display devices, AR/VR helmets and other products. In this case, the support structure 110 can be suspended or clamped. The method is fixed near the user's ear.
  • a hook may be provided on the supporting structure 110, and the shape of the hook matches the shape of the auricle, so that the acoustic output device 100 can be independently worn on the user's ear through the hook.
  • the acoustic output device 100 for independent wear can be connected to a signal source (for example, a computer, a mobile phone or other mobile devices) in a wired or wireless (for example, Bluetooth) manner.
  • a signal source for example, a computer, a mobile phone or other mobile devices
  • a wired or wireless for example, Bluetooth
  • the acoustic output device 100 at the left and right ears may include a first output device and a second output device, where the first output device can communicate with the signal source, and the second output device can communicate with the first output device in a wireless manner.
  • the first output device and the second output device realize synchronization of audio playback through one or more synchronization signals.
  • the wireless connection mode may include, but is not limited to, Bluetooth, local area network, wide area network, wireless personal area network, near field communication, etc., or any combination thereof.
  • the supporting structure 110 may be a housing structure with a shape adapted to the human ear, such as a circular ring shape, an oval shape, a polygonal shape (regular or irregular), a U shape, a V shape, and a semicircular shape to support The structure 110 can be directly hung on the user's ear.
  • the supporting structure 110 may also include one or more fixing structures.
  • the fixing structure may include an ear hook, a head beam or an elastic band, so that the acoustic output device 100 can be better fixed on the user's body and prevent the user from falling during use.
  • the elastic band may be a headband, and the headband may be configured to be worn around the head area.
  • the elastic band may be a neckband, configured to be worn around the neck/shoulder area.
  • the elastic band may be a continuous band and can be elastically stretched to be worn on the user's head, and the elastic band can also apply pressure to the user's head, making the acoustic output device 100 firm The ground is fixed on a specific position of the user's head.
  • the elastic band may be a discontinuous band.
  • the elastic band may include a rigid part and a flexible part, wherein the rigid part may be made of a rigid material (for example, plastic or metal), and the rigid part may be physically connected with the support structure 110 of the acoustic output device 100 (for example, clip-on , Threaded connection, etc.).
  • the flexible portion may be made of elastic material (for example, cloth, composite material or/and neoprene).
  • the support structure 110 when the user wears the acoustic output device 100, the support structure 110 may be located above or below the auricle.
  • the supporting structure 110 can also be provided with sound guide holes 111 and sound guide holes 112 for transmitting sound.
  • the sound guide hole 111 and the sound guide hole 112 may be respectively located on both sides of the user's auricle, and the acoustic driver 120 may output sound outward through the sound guide hole 111 and the sound guide hole 112.
  • the acoustic driver 120 is an element that can receive electrical signals and convert them into sound signals for output.
  • the type of acoustic driver 120 may include low-frequency (for example, 30Hz-150Hz) acoustic driver, medium and low frequency (for example, 150Hz-500Hz) acoustic driver, medium and high frequency (for example, 500Hz-5kHz) Acoustic driver, high frequency (for example, 5kHz-16kHz) acoustic driver, or full-frequency (for example, 30Hz-16kHz) acoustic driver, or any combination thereof.
  • low-frequency for example, 30Hz-150Hz
  • medium and low frequency for example, 150Hz-500Hz
  • medium and high frequency for example, 500Hz-5kHz
  • Acoustic driver high frequency (for example, 5kHz-16kHz) acoustic driver, or full-frequency (for example, 30Hz-16kHz) acoustic driver, or any combination thereof.
  • the low frequency, high frequency, etc. mentioned here only represent the approximate range of the
  • a crossover point can be determined, low frequency represents the frequency range below the crossover point, and high frequency represents the frequency above the crossover point.
  • the crossover point can be any value within the audible range of the human ear, for example, 500 Hz, 600 Hz, 700 Hz, 800 Hz, 1000 Hz, etc.
  • the acoustic driver 120 may also include, but is not limited to, moving coil, moving iron, piezoelectric, electrostatic, magnetostrictive, and other drivers.
  • the acoustic driver 120 may include a diaphragm. When the diaphragm vibrates, sound can be emitted from the front and back sides of the diaphragm, respectively.
  • the front side of the diaphragm in the support structure 110 is provided with a front chamber 113 for transmitting sound.
  • the front chamber 113 is acoustically coupled with the sound guide hole 111, and the sound on the front side of the diaphragm can be emitted from the sound guide hole 111 through the front chamber 113.
  • a rear chamber 114 for transmitting sound is provided at a position behind the diaphragm in the support structure 110.
  • the rear chamber 114 is acoustically coupled with the sound guide hole 112, and the sound on the rear side of the diaphragm can be emitted from the sound guide hole 112 through the rear chamber 114.
  • the front and back sides of the diaphragm can simultaneously produce a set of opposite phase sounds.
  • the structure of the front chamber 113 and the rear chamber 114 may be arranged so that the sound output by the acoustic driver 120 at the sound guide hole 111 and the sound guide hole 112 meets specific conditions.
  • the length of the front chamber 113 and the rear chamber 114 can be designed so that a set of sounds with a specific phase relationship (for example, opposite phase) can be output at the sound guide hole 111 and the sound guide hole 112, so that the acoustic output device 100 has a near field Both the lower listening volume and the far-field leakage problem have been effectively improved.
  • the acoustic driver 120 may also include multiple diaphragms (for example, two diaphragms).
  • the multiple vibrating membranes vibrate respectively to generate sound, and the sound is respectively transmitted from the corresponding sound guide hole through different cavities or sound guide tubes connected to the support structure.
  • the multiple diaphragms can be controlled by the same or different controllers respectively, and can produce sounds that meet certain phase and amplitude conditions (for example, sounds with the same amplitude but opposite phases, sounds with different amplitudes and opposite phases, etc. ).
  • the controller can be used to control the phase and amplitude of the acoustic driver.
  • the number of controllers in the acoustic output device may be one or more.
  • the number of controllers may be one.
  • a controller can simultaneously control multiple acoustic drivers to produce sounds that meet certain phase and amplitude conditions through control signals.
  • the acoustic output device may include an equal number of acoustic drivers and controllers. Each controller can control the corresponding acoustic driver to produce sound with certain phase and amplitude conditions.
  • the acoustic output device includes two acoustic drivers as an example.
  • the acoustic output device 200 may include a supporting structure 210, a first acoustic driver 221, a second acoustic driver 222, and a controller (not shown in FIG. 2).
  • the supporting structure 110 may also be provided with sound guide holes 211 and sound guide holes 212 for guiding sound.
  • the first acoustic driver 221, the second acoustic driver 222 and the controller are all arranged inside the supporting structure 210.
  • the controller can control the first acoustic driver 221 and the second acoustic driver 222 through a control signal to generate sounds that meet certain phase and amplitude conditions (for example, sounds with the same amplitude but opposite phases, sounds with different amplitudes and opposite phases, etc. ).
  • the sound guide hole 211 and the sound guide hole 212 may be located on both sides of the user’s auricle, and the first acoustic driver 221 may output sound through the sound guide hole 211, and the second acoustic driver 221 may pass through The sound guide hole 212 outputs sound to the outside.
  • a cavity 213 for transmitting sound is provided between the first acoustic driver 221 and the sound guide hole 211 in the supporting structure 210.
  • the sound generated by the first acoustic driver 211 may be emitted from the sound guide hole 211 through the cavity 213.
  • a cavity 214 for transmitting sound is provided between the second acoustic driver 222 and the sound guide hole 212 in the supporting structure 210.
  • the sound generated by the second acoustic driver 222 may be emitted from the sound guide hole 212 through the cavity 214.
  • the controller may control the first acoustic driver 221 and the second acoustic driver 222 to simultaneously generate a set of sounds with opposite phases through a control signal.
  • the controller can adjust the two electrical signals input to the first acoustic driver 221 and the second acoustic driver 222 through the control signal. , So that the two electrical signals have opposite phases. In this way, driven by electrical signals with opposite phases, the first acoustic driver 221 and the second acoustic driver 222 can generate sounds with opposite phases. When the sound passes through the cavity 213 and the cavity 214 respectively, it will propagate outward from the positions of the sound guide hole 211 and the sound guide hole 212.
  • the structure of the chamber 213 and the chamber 214 can be configured so that the sound output by the first acoustic driver 221 at the sound guide hole 211 and the sound output by the second acoustic driver 222 at the sound guide hole 212 satisfy Specific conditions.
  • the lengths of the cavity 213 and the cavity 214 can be designed so that the sound guide hole 211 and the sound guide hole 212 can output sounds with opposite phases.
  • the controller may control the first acoustic driver 221 and the second acoustic driver 222 to simultaneously generate a set of sounds with the same amplitude through a control signal.
  • the controller can adjust the two electrical signals input to the first acoustic driver 221 and the second acoustic driver 222 through the control signal, and the two electrical signals
  • the output power of the first acoustic driver 221 and the second acoustic driver 222 can be separately controlled so that the two electrical signals have the same amplitude. In this way, driven by electrical signals with the same amplitude, the first acoustic driver 221 and the second acoustic driver 222 can generate sounds with the same amplitude.
  • the controller is not limited to the above-mentioned controlling the first acoustic driver 221 and the second acoustic driver 222 to generate sounds with the same amplitude and opposite phase through the control signal.
  • the controller may also use different control signals to make the first acoustic driver 221 and the second acoustic driver 222 generate sounds with the same amplitude and the same phase.
  • the controller may also use different control signals to cause the first acoustic driver 221 and the second acoustic driver 222 to generate sounds with different amplitudes and phases.
  • the controller can also control the amplitude and phase of acoustic drivers other than the first acoustic driver 221 and the second acoustic driver 222, and can be adjusted according to specific requirements.
  • the acoustic output device distributing two sound guide holes on both sides of the auricle can increase the volume of the sound (also referred to as near-field sound) heard by the user's ear and suppress the leakage of the acoustic output device to a certain extent.
  • the acoustic output device may further divide the two sound guide holes by a baffle to achieve the effects of increasing near-field sound and reducing far-field sound leakage.
  • Fig. 3 is a schematic structural diagram of an acoustic output device provided according to some embodiments of the present application. As shown in FIG. 3, the acoustic output device 300 may include a supporting structure 310, an acoustic driver 320, a baffle 330, and a controller.
  • the acoustic driver 320 and the controller may be located inside the supporting structure 310.
  • the supporting structure 310 may also be provided with sound guide holes 311 and sound guide holes 312 for guiding sound.
  • the sound guide hole 311 and the sound guide hole 312 may be located on the front side or the back side of the auricle at the same time.
  • the sound level of the acoustic output device 300 at any point in the space is related to the distance from the point to the sound guide hole 311 and the sound guide hole 312.
  • the sound guide hole 311 and the sound guide hole 312 respectively output sounds with the same amplitude and opposite phase (represented by the symbols "+" and "-").
  • the baffle 130 can be used to adjust the distance from the sound guide hole 311 and the sound guide hole 312 to the user's ear (that is, the listening position).
  • the sound guide hole 311 and the sound guide hole 312 may be located on both sides of the baffle 330 respectively.
  • the number of baffles 330 may be one or more.
  • one or more baffles 330 may be provided between the sound guide hole 311 and the sound guide hole 312.
  • the acoustic output device 300 further includes sound guide holes other than the sound guide hole 311 and the sound guide hole 312, one or more baffles 330 may be provided between every two sound guide holes.
  • the baffle 330 may be fixedly connected to the supporting structure 310.
  • the baffle 330 may be used as a part of the supporting structure 310 or integrally formed with the supporting structure 310. In other embodiments, the baffle 330 may also be connected to other components of the acoustic output device 300 (for example, the outer casing of the acoustic output device 300).
  • the acoustic driver 320 may include a diaphragm. When the diaphragm vibrates, sound can be emitted from the front and back sides of the diaphragm, respectively.
  • the front side of the diaphragm in the support structure 310 is provided with a front chamber 313 for transmitting sound.
  • the front chamber 313 is acoustically coupled with the sound guide hole 311, and the sound on the front side of the diaphragm can be emitted from the sound guide hole 311 through the front chamber 313.
  • a rear chamber 314 for transmitting sound is provided at a position behind the diaphragm in the support structure 310.
  • the rear chamber 314 is acoustically coupled with the sound guide hole 312, and the sound on the rear side of the diaphragm can be emitted from the sound guide hole 112 through the rear chamber 114.
  • the front and back sides of the diaphragm can simultaneously produce a set of opposite phase sounds.
  • the sound passes through the front chamber 313 and the rear chamber 314 respectively, it will propagate outward from the positions of the sound guide hole 311 and the sound guide hole 312.
  • the specific content of the supporting structure 310, the acoustic driver 320, the controller, the front chamber 313, and the rear chamber 314 in the acoustic output device 300 is similar to the description of the corresponding structure in FIG. 1, and will not be repeated here.
  • the above description is only for convenience of description and is not used to limit the application. It can be understood that those skilled in the art, after understanding the principle of the present application, can make various modifications and changes in the form and details of the above acoustic output device without violating this principle.
  • the number of acoustic drivers in the acoustic output device is not limited to two in FIG. 2, but can also be three, four, five, etc., and the supporting structure can be adjusted adaptively according to the number and distribution of acoustic drivers.
  • the acoustic driver and the sound guide hole may also be acoustically coupled through the sound guide tube. The above changes are all within the protection scope of this application.
  • the acoustic output device and the auricle can be equivalent to a dual sound source-baffle model in this application.
  • each sound guide hole on the acoustic output device can be approximately regarded as a point sound source.
  • the sound field sound pressure p generated by a single-point sound source satisfies formula (1):
  • ⁇ is the angular frequency
  • ⁇ 0 is the air density
  • r is the distance between the target point and the sound source
  • Q 0 is the volume velocity of the sound source
  • k is the wave number
  • the distance is inversely proportional.
  • Two sound guide holes can be provided in the acoustic output device to construct a dual-point sound source to reduce the sound radiated by the sound output device to the surrounding environment (ie, far-field sound leakage).
  • the two sound guide holes that is, the two-point sound source
  • the acoustic output device can show different sound effects in the near field and the far field.
  • the far-field leakage can be realized according to the principle of sound wave anti-phase cancellation. Tone reduction.
  • the sound field sound pressure p generated by the two-point sound source satisfies the following formula:
  • a 1 and A 2 are the intensities of two point sound sources
  • ⁇ 1 and ⁇ 2 are the phases of the point sound sources
  • d is the distance between the two point sound sources
  • r 1 and r 2 satisfy the formula (3 ):
  • r is the distance between any target point in space and the center of the dual-point sound source
  • ⁇ represents the angle between the line between the target point and the center of the dual-point sound source and the line where the dual-point sound source is located.
  • the size of the sound pressure p of the target point in the sound field is related to the intensity, spacing d, phase of the sound source at each point, and the distance from the sound source.
  • Fig. 5 is a schematic diagram of two point sound sources and listening positions provided according to some embodiments of the present application.
  • Fig. 6 is a frequency response characteristic curve of a near-field listening position of two-point sound sources with different spacings according to some embodiments of the present application.
  • the listening position is taken as the target point to further illustrate the relationship between the sound pressure at the target point and the point sound source distance d.
  • the listening position mentioned here can be used to indicate the position of the user's ears, that is, the sound at the listening position can be used to indicate the near-field sound produced by two point sound sources.
  • near-field sound means a sound within a certain range from a sound source (for example, a point sound source equivalent to the sound guide hole 111), for example, a sound within a range of 0.2 m from the sound source.
  • a sound source for example, a point sound source equivalent to the sound guide hole 111
  • the point sound sources A 1 and A 2 point source located on the same side of the listening position, and a point sound source closer to the listening position A 1, A 1 point source and a point
  • the sound source A 2 respectively outputs sounds with the same amplitude but opposite phases. 6, with the increase of point sound sources A 1 and A 2 pitch point sound source (e.g., by the increased 1Od d), gradually increases the volume of the listening position.
  • the amplitude difference that is, the sound pressure difference
  • the sound path difference becomes larger, making the sound The destructive effect becomes weaker, which in turn increases the volume of the listening position.
  • the volume at the listening position in the middle and low frequency bands (for example, the sound with a frequency less than 1000 Hz) is still lower than the volume produced by a single-point sound source at the same location and the same intensity.
  • the sound pressure amplitude that is, the sound pressure
  • the sound pressure may refer to the pressure generated by the vibration of sound through air.
  • the volume at the listening position can be increased by increasing the distance between the two-point sound source (for example, the point sound source A 1 and the point sound source A 2 ), but as the distance increases, the sound of the two-point sound source The cancellation ability becomes weak, which in turn leads to an increase in far-field sound leakage.
  • FIG. 7 is a diagram of the leakage index of two-point sound sources with different spacings in the far field according to some embodiments of the present application. As shown in Figure 7, taking the far-field sound leakage index of a single-point sound source as a reference, as the distance between two-point sound sources increases from d to 10d, the far-field sound leakage index gradually increases, indicating that the sound leakage gradually becomes larger. .
  • the leakage index please refer to formula (4) and related descriptions in the specification of this application.
  • FIG. 8 is an exemplary distribution diagram of baffles provided between two-point sound sources according to some embodiments of the present application. As shown in Figure 8, when a baffle is provided between the point sound source A 1 and the point sound source A 2 , in the near field, the sound field of the point sound source A 2 needs to bypass the baffle to be able to communicate with the point sound source A 1 The sound waves interfere at the listening position, which is equivalent to increasing the sound path from the point sound source A 2 to the listening position.
  • the amplitude of the sound waves of the point sound source A 1 and the point sound source A 2 at the listening position is compared with that without a baffle.
  • the value difference increases, so that the degree of cancellation of the two sounds at the listening position decreases, and the volume at the listening position increases.
  • the sound waves generated by the point sound source A 1 and the point sound source A 2 can interfere in a larger space without bypassing the baffle (similar to the case of no baffle), which is compared to Without a baffle, the sound leakage in the far field will not increase significantly. Therefore, setting a baffle structure between the point sound source A 1 and the point sound source A 2 can significantly increase the volume of the near-field listening position without significantly increasing the volume of the far-field leakage sound.
  • FIG. 9 is a near-field frequency response characteristic curve when the auricle is located between two-point sound sources according to some embodiments of the application
  • FIG. 10 is a near-field frequency response characteristic curve when the auricle is located between the two-point sound sources according to some embodiments of the application
  • the frequency response characteristic curve of the far field when the two-point sound sources are located on both sides of the auricle, the auricle has the effect of a baffle, so for convenience, the auricle may also be called a baffle.
  • the result can be equivalent to that the near-field sound is produced by a two-point sound source with a spacing of D 1 (also called mode 1), and the far-field sound is produced by a two-point sound source with a spacing of D 2 Point sound source generation (also called mode 2), where D 1 >D 2 .
  • D 1 also called mode 1
  • D 2 Point sound source generation also called mode 2
  • D 1 >D 2 Point sound source generation
  • the near-field sound volume is basically the same, and both are greater than the near-field sound volume of Mode 2, and are close to the near-field sound volume of a single-point sound source.
  • the frequency increases (for example, when the frequency is between 2000 Hz and 7000 Hz)
  • the volume of the near-field sound when the mode 1 and two-point sound sources are distributed on both sides of the auricle is greater than that of the single-point sound source. This shows that when the user's auricle is located between the two-point sound source, the near-field sound volume transmitted from the sound source to the user's ear can be effectively enhanced.
  • the far-field leakage sound volume will increase, but when the two-point sound source is distributed on both sides of the auricle, the far-field leakage sound volume generated by it is the same as that of the far-field mode 2
  • the sound leakage volume is basically the same, and both are smaller than the far-field leakage sound volume of Mode 1 and the far-field sound leakage volume of a single-point sound source. This shows that when the user's auricle is located between the two-point sound source, the sound transmitted from the sound source to the far field can be effectively reduced, that is, the sound leakage from the sound source to the surrounding environment can be effectively reduced.
  • the leakage index ⁇ can be used as an index to evaluate the ability to reduce the leakage:
  • the sound leakage index when the two-point sound source is distributed on both sides of the auricle is smaller than Mode 1 (there is no baffle structure between the two-point sound source, and the distance is D 1 ), Mode 2 (no baffle structure between the two-point sound source, and the spacing is D 2 ) and the leakage index in the case of a single-point sound source, which shows that when the two-point sound source is located on both sides of the auricle, the acoustic output
  • the device has better ability to reduce leakage.
  • Fig. 12 is a schematic diagram of measuring the leakage index provided according to some embodiments of the present application.
  • the listening position is on the left side of the point sound source A 1
  • the leakage measurement method is to select the two-point sound source (A 1 and A 2 as shown in Figure 12) as the center of the circle and the radius as The average value of the sound pressure amplitude at each point on the spherical surface of r is taken as the value of sound leakage.
  • the method of measuring leakage sound in this manual is only an exemplary explanation of the principle and effect, and is not limited.
  • the measurement and calculation method of leakage sound can also be adjusted reasonably according to the actual situation, for example, taking the far-field position One point or more than one point is used as the location for measuring leakage. For another example, taking the center of the two-point sound source as the center of the circle, the sound pressure amplitudes of two or more points are uniformly averaged according to a certain spatial angle in the far field.
  • the listening measurement method may be to select a location point near the point sound source as the listening position, and use the sound pressure amplitude measured at the listening position as the listening value.
  • the listening position may be on the line of two point sound sources or not on the line of two point sound sources. The listening measurement and calculation methods can also be adjusted reasonably according to the actual situation.
  • the sound pressure amplitude of other points or more than one point in the near field position can be averaged.
  • the sound pressure amplitudes of two or more points are uniformly averaged according to a certain spatial angle in the near field.
  • the distance between the near-field listening position and the point sound source is much smaller than the distance between the point sound source and the far-field sound leakage measurement sphere.
  • the use of the sound guide hole for outputting sound as a point sound source in this application is only used as an explanation of the principle and effect, and does not limit the shape and size of the sound guide hole in practical applications.
  • the area of the sound guide hole is larger, it can also be equivalent to radiating sound outward in the form of a surface sound source.
  • the point sound source can also be realized by other structures, such as a vibrating surface, a sound radiating surface, and so on.
  • the sound produced by structures such as sound guide holes, vibrating surfaces, and sound radiating surfaces can be equivalent to point sound at the spatial scale discussed in this application.
  • the source has the same sound propagation characteristics and the same mathematical description. Further, for those skilled in the art, without paying any creative activity, it can be known that the acoustic effect achieved by the "acoustic driver outputting sound from at least two first sound guide holes" described in this application can also be achieved by the above Other acoustic structures achieve the same effect, such as "at least two acoustic drivers output sound from at least one sound radiating surface". According to the actual situation, other acoustic structures can be selected for reasonable adjustment and combination, and the same acoustic output effect can also be achieved.
  • the principle of the above-mentioned surface sound source and other structures to radiate sound is similar to the above-mentioned point sound source, so I will not repeat it here. .
  • the number of sound guide holes (point sound source or surface sound source) on the acoustic output device is not limited to the above two, and the number can be three, four, five, etc., thereby forming multiple groups
  • the form of the dual-point/surface sound source, or a group of multi-point/surface sound sources is not specifically limited here, and it can also achieve the technical effects that can be achieved by the dual-point sound source in this application.
  • the near-field volume or/and of the listening position under different conditions The far-field leakage volume is specified.
  • Fig. 13 is a graph of frequency response between two point sound sources provided with and without baffles according to some embodiments of the present application.
  • the acoustic output device adds a baffle between two point sound sources (ie, two sound guide holes), in the near field, it is equivalent to increasing the distance between the two point sound sources.
  • the sound volume at the listening position is equivalent to being produced by a set of two-point sound sources with a large distance, so that the listening volume in the near field is significantly increased compared to the case without a baffle.
  • the sound leakage is equivalent to a set of two point sound sources with a small distance, so the sound leakage is in the presence or absence of baffles.
  • the situation does not change significantly. It can be seen that by setting a baffle between the two sound guide holes (two-point sound source), while effectively improving the sound output device's ability to reduce leakage, it can also significantly increase the near-field volume of the sound output device. Therefore, the requirements for the components that play a sounding role in the acoustic output device are greatly reduced.
  • the electrical loss of the acoustic output device can be reduced. Therefore, the use time of the acoustic output device can be greatly extended under the condition of a certain amount of power.
  • FIG. 14 is a near-field frequency response characteristic curve when the distance d between two-point sound sources is 1 cm according to some embodiments of the application
  • FIG. 15 is a near-field frequency response curve when the distance d between two-point sound sources is 2 cm according to some embodiments of the application.
  • Field frequency response characteristic curve FIG. 16 is a near-field frequency response characteristic curve when the distance d of a two-point sound source provided according to some embodiments of the present application is 4 cm
  • FIG. 17 is a near-field frequency response characteristic curve provided according to some embodiments of the present application.
  • the sound leakage index curve in the far field when d is 1 cm.
  • FIG. 18 is the sound leakage index curve in the far field when the two-point sound source spacing d is 2 cm according to some embodiments of the present application.
  • FIG. 19 is based on some implementations of the present application. The example provides the far-field sound leakage index curve when the distance d between the two-point sound source is 4cm.
  • the sound guide holes d for different sound guide holes d (for example, 1cm, 2cm, 4cm), at a certain frequency, in the near-field listening position (for example, the user’s ears), two guide holes
  • the sound holes are respectively arranged on both sides of the auricle (that is, when the “baffle effect” is shown in the figure)
  • the sound volume provided is higher than when the two sound guide holes are not arranged on both sides of the auricle (that is, as shown in the figure) Shows the "no baffle effect" when the volume provided is loud.
  • the certain frequency mentioned here may be below 10000 Hz, or preferably, below 5000 Hz, or more preferably, below 1000 Hz.
  • the distance d between two sound guide holes or two-point sound sources cannot be too large.
  • the distance d between the two sound guide holes can be set to be no more than 20 cm.
  • the distance d between the two sound guide holes can be set to no more than 12cm, preferably, the distance d between the two sound guide holes can be set to no more than 10cm, preferably, the distance d between the two sound guide holes It can be set to be no more than 8cm, more preferably, the distance d between the two sound guide holes can be set to be no more than 6cm, and further preferably, the distance d between two sound guide holes can be set to be no more than 3cm.
  • the acoustic output device may be provided with at least two sound guide holes, and the at least two sound guide holes include two sound guide holes respectively located on the front and rear sides of the user's auricle. Sound guide hole.
  • the sound guide hole located on the front of the auricle is away from the user’s ear canal.
  • the acoustic path (that is, the acoustic distance from the sound guide hole to the entrance of the user's ear canal) is shorter than the acoustic path of the sound guide hole located at the back of the auricle from the user's ear.
  • the acoustic output device may include two sound guide holes, the two sound guide holes are respectively located on both sides of the listening position, the baffle is located on one side of the listening position, and the two sound guide holes The distance from the sound guide hole on the same side of the baffle to the listening position is smaller than the distance from the other sound guide hole to the listening position.
  • four representative listening positions (listening position 1, listening position Listening position 2, listening position 3, listening position 4), explain the effect and principle of listening position selection.
  • the distance between listening position 1, listening position 2, and listening position 3 and the point sound source A 1 is equal to r 1
  • the distance between listening position 4 and the point sound source A 1 is r 2
  • point sound source A 1 and point sound source A 2 respectively produce sounds with opposite phases.
  • Fig. 21 is a graph showing the frequency response characteristics of a double-point sound source without a baffle provided by some embodiments of the present application at different listening positions in the near field.
  • Fig. 22 is based on Fig. 21 and obtained according to formula (4) Leakage index graphs for different listening positions. As shown in Figures 21 and 22, for the listening position 1, since the sound path difference between the point sound source A 1 and the point sound source A 2 in the listening position 1 is small, the two point sound sources are generated at the listening position 1. The difference in the amplitude of the sound is small, so the sound of the two point sound sources interferes in the listening position 1, resulting in a lower listening volume compared to other listening positions.
  • listening position 2 compared to listening position 1, the distance between the listening position and point sound source A 1 has not changed, that is, the sound interval from point sound source A 1 to listening position 2 has not changed, but the listening position
  • the distance between position 2 and point sound source A 2 increases, the sound path from point sound source A 2 to listening position 2 increases, and the difference in amplitude of the sound produced by point sound source A 1 and point sound source A 2 at this position Increase, so the listening volume after the interference of the two point sound sources at listening position 2 is greater than the listening volume at listening position 1.
  • the listening volume at listening position 3 is the largest.
  • the listening volume of the near-field listening position will change with the relative position of the listening position and the two point sound sources.
  • the listening position When the listening position is on the line connecting two point sound sources and on the same side of the two point sound sources (for example, listening position 3), the sound path difference between the two point sound sources at the listening position is the largest (sound path The difference is the distance d) between the two point sound sources. In this case (that is, when the auricle is not used as a baffle), the listening volume at this listening position is greater than the listening volume at other positions.
  • formula (4) when the far-field sound leakage is constant, the sound leakage index corresponding to the listening position is the smallest, and the ability to reduce leakage is the strongest.
  • reducing the distance r 1 between the listening position and the point sound source A 1 (for example, listening position 4) can further increase the volume of the listening position, reduce the sound leakage index, and improve the ability to reduce the leakage.
  • Fig. 23 is a graph showing the frequency response characteristics of a baffled two-point sound source (as shown in Fig. 20) at different listening positions in the near field according to some embodiments of the present application.
  • Fig. 24 is based on Fig. 23 , According to formula (4) to obtain the leakage index map of different listening positions.
  • the listening volume generated by the dual-point sound source at listening position 1 when there is a baffle increases significantly, and the listening volume at listening position 1 exceeds the listening volume The listening volume at position 2 and listening position 3.
  • the listening volume of the near-field listening position changes with the change of the listening position, so in different listening positions, according to formula (4) .
  • the leakage index of the acoustic output device is different.
  • the listening positions with higher listening volume for example, listening position 1 and listening position 4
  • the listening positions with lower listening volume for example, listening position Position 2 and listening position 3
  • the leakage index is larger, and the ability to reduce the leakage is weak.
  • the user's auricle can be used as a baffle, and the two sound guide holes on the acoustic output device can be arranged on the front and rear sides of the auricle, and the ear canal is located at two listening positions. Between sound guide holes.
  • the distance from the sound guide hole on the front of the auricle to the ear canal is smaller than the distance from the sound guide hole on the back of the auricle to the ear canal.
  • the acoustic output device may include one or more contact points (for example, "inflection points" on the support structure to match the shape of the ear) that contact the auricle when worn.
  • the contact point may be located on the line of the two sound guide holes or on one side of the line of the two sound guide holes.
  • the ratio of the distance between the sound guide hole on the front side to the contact point and the distance from the sound guide hole on the back side to the contact point may be between 0.05 and 1, preferably between 0.1 and 1, more preferably, between 0.2 -1, more preferably, 0.4-1.
  • the distance from the sound guide hole on the same side of the baffle as the listening position (for example, the user’s ear hole) to the listening position is smaller than that of the other baffle. The distance between the sound guide hole on the side and the listening position.
  • the sound guide hole on the same side of the baffle as the listening position is closer to the listening position, the sound guide hole on the same side of the baffle as the listening position
  • the sound amplitude produced at the listening position is larger, while the sound guide hole on the other side of the baffle produces a smaller sound amplitude at the listening position, reducing the sound of the two sound guide holes in the listening position
  • the interference at the position cancels, so as to ensure that the listening volume at the listening position is louder.
  • the acoustic output device when the distance between one of the two sound guide holes and the baffle is much smaller than the distance between the other sound guide hole and the baffle, the acoustic output device is also at the near-field listening position. Will have a louder volume.
  • the ratio of the distance from one sound guide hole to the baffle in the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 2/3.
  • the ratio of the distance from one sound guide hole to the baffle of the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 1/2.
  • the ratio of the distance from one sound guide hole to the baffle of the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 1/3.
  • the ratio of the distance from one sound guide hole to the baffle of the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 1/4.
  • the ratio of the distance from one sound guide hole to the baffle of the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 1/6.
  • the ratio of the distance from one sound guide hole to the baffle of the two sound guide holes to the distance from the other sound guide hole to the baffle is not more than 1/10.
  • the two sound guide holes of the acoustic output device may also be located on the same side of the listening position at the same time.
  • the two sound guide holes of the acoustic output device may be located below the listening position (for example, the ear holes of the user) at the same time.
  • the two sound guide holes of the acoustic output device may be located in front of the listening position at the same time. It should be noted that the two sound guide holes of the acoustic output device are not limited to be located below and in front of the listening position, and the two sound guide holes may also be located above the listening position.
  • the two sound guide holes of the acoustic output device are not limited to the vertical arrangement and the horizontal arrangement, and the two sound guide holes of the acoustic output device can also be arranged obliquely.
  • the listening position can be located on the line of the two sound guide holes or not on the line of the two sound guide holes.
  • the listening position can be located on the upper, lower, left or right side of the connection between the two sound guide holes.
  • the ratio of the distance from the sound guide hole close to the listening position to the distance between the two sound guide holes may not be greater than 3.
  • the ratio of the distance from the sound guide hole close to the listening position to the distance between the two sound guide holes may not be greater than 1.
  • the ratio of the distance from the sound guide hole near the listening position to the distance between the two sound guide holes may not be greater than 0.9. More preferably, the ratio of the distance from the sound guide hole close to the listening position to the distance between the two sound guide holes may not be greater than 0.6. More preferably, the ratio of the distance between the sound guide hole near the listening position to the listening position and the distance between the two sound guide holes may not be greater than 0.3.
  • FIG. 25 is a schematic diagram of an exemplary distribution of dual-point sound sources and baffles provided according to some embodiments of the present application.
  • the position of the baffle between the two sound guide holes also has a certain influence on the sound output effect. For illustrative purposes only, as shown in FIG.
  • a baffle is provided between the point sound source A 1 and the point sound source A 2 , and the listening position (for example, the user's ear hole) is located between the point sound source A 1 and the point sound source A 2 a 2 of the connection, and the listening position is located between the point source and the baffle a 1, a 1 point sound source and the distance the shutter is L, between the point source and a point sound sources a 1 a 2
  • the distance is d
  • the distance between the point sound source A1 and the listening sound is L 1
  • the distance between the listening position and the baffle is L 2
  • the height of the baffle in the direction perpendicular to the connection of the two-point sound source is h
  • the distance from the center of the board to the line connecting the two point sound sources is H.
  • FIG. 26 is a frequency response characteristic curve of the near field of the baffle provided according to some embodiments of the present application at different positions
  • FIG. 27 is a frequency response characteristic curve of the far field of the baffle provided according to some embodiments of the present application at different positions
  • Fig. 28 is a graph of the sound leakage index of the baffle provided in different positions according to some embodiments of the present application. Combining Figure 25 to Figure 28, the far-field sound leakage varies little with the position of the baffle between the two-point sound sources.
  • the listening position is farther away from the baffle, and the baffle has less influence on the sound path difference between the point sound source A 1 and the point sound source A 2 reaching the listening position, so the listening position is added after the baffle is added.
  • the volume changes less.
  • the baffle or human auricle
  • the position of the two sound guide holes can be designed so that when the user wears the acoustic output device, the sound guide hole on the front side of the auricle is connected to the auricle (or the acoustic output device is used for contact with the auricle).
  • the ratio of the distance between the dots) to the distance between the two sound guide holes is not more than 0.5.
  • the ratio of the distance from the sound guide hole on the front side of the auricle to the auricle (or the contact point on the acoustic output device for contacting the auricle) to the distance between the two sound guide holes is not greater than 0.3.
  • the ratio of the distance from the sound guide hole on the front side of the auricle to the auricle (or the contact point on the acoustic output device for contacting the auricle) to the distance between the two sound guide holes is not greater than 0.1.
  • the positions of the two sound guide holes can be designed so that when the user wears the acoustic output device, the distance between the sound guide hole and the baffle near the listening position (for example, the entrance position of the human ear canal) is equal to two
  • the ratio of the pitch between the sound guide holes is not more than 0.5.
  • the ratio of the distance between the sound guide hole near the listening position to the baffle and the distance between the two sound guide holes is not greater than 0.3.
  • the sound path from the acoustic driver to the sound guide hole in the acoustic output device has a certain effect on the near-field volume and far-field leakage.
  • the sound path can be changed by adjusting the length of the cavity between the diaphragm and the sound guide hole in the acoustic output device.
  • the acoustic driver includes one diaphragm, and the front and rear sides of the diaphragm are respectively coupled to two sound guide holes through the front chamber and the rear chamber.
  • the sound path between the diaphragm and the two sound guide holes is different.
  • the sound path ratio of the diaphragm to the two sound guide holes is 0.5-2.
  • the sound path ratio of the diaphragm to the two sound guide holes is 0.6-1.5. Further preferably, the sound path ratio of the diaphragm to the two sound guide holes is 0.8-1.2.
  • the sound path from each acoustic driver to the sound guide hole can be adjusted by changing the length of the cavity from the output end of each acoustic driver to the sound guide hole.
  • the acoustic output device may include a first acoustic driver and a second acoustic driver
  • the two sound guide holes may include a first sound guide hole and a second sound guide hole, the first acoustic driver and the second acoustic driver respectively
  • the first cavity and the second cavity are coupled to two sound guide holes.
  • the sound path from the output terminal of the first acoustic driver to the first sound guide hole is different from the sound path from the output terminal of the second acoustic driver to the second sound guide hole.
  • the sound path ratio from the output end of the first acoustic driver to the first sound guide hole and the output end of the second acoustic driver to the second sound guide hole is 0.5-2.
  • the sound path ratio from the output end of the first acoustic driver to the first sound guide hole and the output end of the second acoustic driver to the second sound guide hole is 0.6-1.5. Further preferably, the sound path ratio from the output end of the first acoustic driver to the first sound guide hole and the output end of the second acoustic driver to the second sound guide hole is 0.8-1.2.
  • the amplitude of the sound generated at the two sound guide holes may be changed on the premise of keeping the phases of the sounds generated at the two sound guide holes opposite to improve the output effect of the acoustic output device.
  • the purpose of adjusting the sound amplitude at the sound guide hole can be achieved by adjusting the impedance of the acoustic path between the two sound guide holes and the acoustic driver.
  • impedance may refer to the resistance to be overcome by the displacement of the medium during sound wave conduction.
  • the acoustic path may be filled with or not filled with damping materials (for example, tuning nets, tuning cotton, etc.) to achieve sound amplitude modulation.
  • a resonant cavity, a sound hole, an acoustic slit, a tuning net, or a tuning cotton may be provided in the acoustic path to adjust the acoustic resistance to change the impedance of the acoustic path.
  • the acoustic resistance of the acoustic path can also be changed by adjusting the apertures of the two sound guide holes.
  • the acoustic impedance ratio of the acoustic driver (the diaphragm) to the two sound guide holes is 0.5-2. More preferably, the ratio of the acoustic impedance of the acoustic driver (diaphragm) to the two sound guide holes is 0.8-1.2.
  • the size of the baffle also affects the sound output effect of the dual-point sound source.
  • Fig. 29 is a frequency response characteristic curve of the near field of the two-point sound source when baffles of different heights are selected in the structure shown in Fig. 25.
  • the volume provided is greater than two.
  • the volume provided is loud.
  • the height of the baffle increases, that is, the ratio of the height of the baffle to the distance between the two-point sound source increases, the volume provided by the two-point sound source at the listening position gradually increases. It can be explained that appropriately increasing the height of the baffle can effectively increase the volume of the listening position.
  • FIG. 30 is the frequency response characteristic curve of the far field of the two-point sound source when baffles of different heights are selected in the structure shown in FIG. 25.
  • the far-field position for example, the environmental position far away from the user’s ears
  • the ratio h/d of the baffle height to the distance between the two-point sound source changes within a certain range (for example, as shown in the figure, h/d is equal to 0.2, 0.6, 1.0, 1.4, 1.8)
  • the leakage sound volume generated by the dual-point sound source is not much different from the leakage sound volume generated by the dual-point sound source without a baffle.
  • the sound leakage volume of the two-point sound source at the far field position is higher than that of the undisturbed sound source.
  • the size of the baffle between the two-point sound sources should not be too large.
  • Fig. 31 is a diagram showing the sound leakage index of the two-point sound source when baffles of different heights are selected in the structure shown in Fig. 25.
  • the sound leakage index when baffles of different heights are arranged between the two-point sound source is smaller than the sound leakage index when the baffle is not arranged between the two-point sound sources. Therefore, in some embodiments, in order to keep the sound output device as loud as possible in the near field while suppressing the sound leakage in the far field, a baffle can be provided between the two sound guide holes and the height of the baffle is equal to two The ratio of the spacing between the sound guide holes is not greater than 5.
  • the ratio of the height of the baffle to the distance between the two sound guide holes is not greater than 3.
  • the ratio of the height of the baffle to the distance between the two sound guide holes is not greater than 2.
  • the ratio of the height of the baffle to the distance between the two sound guide holes is not more than 1.8.
  • the ratio of the height of the baffle to the distance between the two sound guide holes is not more than 1.5.
  • the ratio of the height of the auricle to the distance between the two sound guide holes is not greater than 5.
  • the ratio of the height of the auricle to the distance between the two sound guide holes is not greater than 4.
  • the ratio of the height of the auricle to the distance between the two sound guide holes and the distance between the two sound guide holes is not greater than 3.
  • the ratio of the height of the auricle to the distance between the two sound guide holes is not greater than 2.
  • the ratio of the height of the auricle to the distance between the two sound guide holes is not more than 1.8.
  • the ratio of the height of the auricle to the distance between the two sound guide holes is not greater than 1.5.
  • the height of the auricle may refer to the length of the auricle in a direction perpendicular to the sagittal plane.
  • the distance from the center of the baffle to the connection of the dual-point sound source will also affect the near-field volume and far-field leakage volume of the acoustic output device.
  • the height of the baffle is h, and the distance from the center of the baffle to the line connecting the two point sound sources is H.
  • the center of the baffle may refer to the midpoint of the height of the baffle (that is, the length of the baffle in the direction perpendicular to the line connecting the two-point sound sources). It should be noted that the baffle is not limited to the intersection with the line of the two-point sound source as shown in FIG. 25, and the baffle may also be located above or below the line of the two-point sound source as a whole.
  • Fig. 32 is the frequency response characteristic curve of the near field of the double-point sound source when the ratio of the distance from the center of the baffle to the connection line of the double-point sound source and the height of the baffle in the structure of Fig. 25 takes different values.
  • the volume provided is higher than that of the two-point sound source.
  • the volume provided is high.
  • Fig. 33 is the frequency response characteristic curve of the far field of the double-point sound source when the ratio of the distance from the center of the baffle to the connecting line of the double-point sound source and the height of the baffle in the structure of Fig. 25 takes different values.
  • FIG. 34 is a diagram of the sound leakage index when the ratio of the distance between the center of the baffle to the line of the two-point sound source and the height of the baffle in the structure of FIG. 25 is different.
  • the sound leakage index when the baffles with different positions are set between the two-point sound sources is higher than that between the two-point sound sources.
  • the sound leakage index is small when the baffle is installed (that is, when the baffle is not shown in the figure), it indicates that the sound leakage reduction ability is stronger when the baffle at different positions is installed between the two-point sound sources. Furthermore, as the center of the baffle gets closer, that is, as the distance between the center of the baffle and the two-point sound source gradually decreases, the sound leakage index gradually decreases, and the ability to reduce the sound leakage continues to increase.
  • the ratio of the distance from the center of the baffle to the connection line between the two sound guide holes and the height of the baffle Can be no more than 2.
  • the ratio of the distance from the center of the baffle to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 1.5.
  • the ratio of the distance from the center of the baffle to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 1. More preferably, the ratio of the distance from the center of the baffle to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 0.5. More preferably, the ratio of the distance from the center of the baffle to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 0.3.
  • the supporting structure of the acoustic output device itself can function as a baffle.
  • one of the two sound guide holes may be opened on the side of the support structure facing the user's ear. Further, the opening direction of the sound guide hole may be toward the direction close to the user's ear, and the other sound guide hole It can be opened on the side of the support structure facing away from the user's ear. Further, the opening direction of the sound guide hole can be directed away from the user's ear. In this case, the distance from the structural center of the support structure (referring to the centroid or mass center of the support structure) to the connection of the two sound guide holes will affect the near-field volume and far-field leakage volume of the acoustic output device.
  • the structure center of the support structure mentioned here may refer to the center of the support structure in the direction perpendicular to the connection line of the two sound guide holes.
  • the two sound guide holes of the acoustic output device are located at both ends of the supporting structure ("+” can indicate the sound emitted by the opening facing away from the ear, and "-" can indicate facing the ear The sound made by the opening).
  • the distance between the structural center of the supporting structure and the connection line between the two sound guide holes is H
  • the structural height of the supporting structure is h.
  • the ratio of the distance from the structural center of the supporting structure to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 2.
  • the ratio of the distance from the structural center of the support structure to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 1.5. More preferably, the ratio of the distance from the structural center of the support structure to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 1. Preferably, the ratio of the distance from the structural center of the supporting structure to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 0.5. Preferably, the ratio of the distance from the structural center of the support structure to the connecting line of the two sound guide holes to the height of the baffle may not be greater than 0.3.
  • the two sound guide holes of the acoustic output device in FIG. 35 are not limited to being arranged in a vertical manner as shown in the figure, and may also be arranged in other manners.
  • the two sound guide holes can also be arranged in a horizontal manner (for example, one sound guide hole is located on the front side facing the ear, and the other sound guide hole is located on the back side facing the ear) or inclined.
  • the two sound guide holes are not limited to the situation that they are located on both sides of the listening position in FIG. 35, and may also be located on the same side of the listening position at the same time.
  • two sound guide holes can be located above, below or in front of the listening position at the same time. The above changes are all within the protection scope of this application.
  • baffles can be provided between each of the multiple point sound sources.
  • the plurality of point sound sources may include at least one group of point sound sources with opposite phases.
  • Fig. 36 is a schematic diagram of the distribution of point sound sources and baffles according to some embodiments of the present application.
  • the acoustic output device has 4 point sound sources (respectively corresponding to the 4 sound guide holes on the acoustic output device).
  • the point sound source A 1 and the point sound source A 2 have the same phase
  • the point sound source A 3 and the point sound source A 4 have the same phase
  • the point sound source A 1 and the point sound source A 3 have the opposite phase.
  • the point sound source A 1 , the point sound source A 2 , the point sound source A 3 and the point sound source A 4 may be separated by two cross-arranged baffles or multiple baffles that are spliced together.
  • the point sound source A 1 and the point sound source A 3 (or the point sound source A 4 ), the point sound source A 2 and the point sound source A 3 (or the point sound source A 4 ) can respectively form as described elsewhere in this application Double point sound source.
  • the point sound source A 1 and the point sound source A 3 are arranged relative to each other, and are arranged adjacent to the point sound source A 2 and the point sound source A 4 .
  • the point sound source A 1 and the point sound source A 2 are arranged relative to each other, and are arranged adjacent to the point sound source A 3 and the point sound source A 4 .
  • the acoustic output device has 3 point sound sources (respectively corresponding to the 3 sound guide holes on the acoustic output device).
  • the point sound source A 1 is opposite in phase to the point sound source A 2 and the point sound source A 3 , and can form two sets of double point sound sources as described elsewhere in this application.
  • the point sound source A 1 , the point sound source A 2 and the point sound source A 3 can be separated by two intersecting baffles.
  • the acoustic output device has 3 point sound sources (respectively corresponding to the 3 sound guide holes on the acoustic output device).
  • the point sound source A 1 and the point sound source A 2 have the same phase, and the point sound source A 3 has the opposite phase.
  • the point sound source A 1 and the point sound source A 3 , the point sound source A 2 and the point sound source A 3 may respectively form a double point sound source as described elsewhere in this application.
  • the point sound source A 1 , the point sound source A 2 and the point sound source A 3 can be separated by a V-shaped baffle.
  • Fig. 37 is the frequency response characteristic curve of the near field and the far field with and without baffles between the multi-point sound sources shown in Fig. 36.
  • the listening sound when baffles are set between multiple point sound sources for example, point sound source A 1 , point sound source A 2 , point sound source A 3 and point sound source A 4
  • the volume is significantly greater than the listening volume when the baffle is not set between the multi-point sound sources, which can indicate that the near-field listening volume can be increased when the baffle is set between the multi-point sound sources.
  • the far field there is little difference between the sound leakage volume when the baffle is set between the multipoint sound sources and the sound leakage volume when the baffle is not set between the multipoint sound sources.
  • Fig. 38 is a diagram showing the sound leakage index when a baffle is installed and not installed between multiple point sound sources shown in Fig. 36. As shown in Figure 38, on the whole, the sound leakage index when the baffle is installed between multiple sound sources is significantly reduced compared to the sound leakage index when no baffle is installed between the multi-point sound sources. When the baffle is set between the sound sources, the sound leakage reduction ability is obviously enhanced.
  • Fig. 39 is a diagram of the leakage index corresponding to the two multi-point sound source distribution modes shown in Fig. 36 (a) and (b). As shown in Fig.
  • a baffle may be provided between two of the multiple sound guide holes, that is, each sound guide hole is separated by a baffle.
  • sounds with the same phase (or approximately the same) or opposite (or approximately opposite) phases are output among the plurality of sound guide holes. More preferably, the sound guide holes that output sounds in the same phase can be arranged oppositely, and the sound guide holes that output sounds in opposite phases can be arranged adjacently.
  • the number of point sound sources is not limited to the above three or four, but can also be five, six, seven or more.
  • the specific distribution form of the point sound sources and the structure and shape of the baffle can vary according to The number of point sound sources is adjusted.
  • the shape of the baffle is not limited to the straight plate shown in the figure, and the baffle may also be a curved plate with a certain curvature. The above changes are all within the protection scope of this application.
  • Fig. 40 is a schematic diagram of an exemplary structure of another acoustic output device according to some embodiments of the present application.
  • the frequency band of listening is mainly concentrated in the middle and low frequency bands, and the optimization goal is mainly to increase the listening volume in this frequency band.
  • the parameters of the dual-point sound source can be adjusted by certain means to achieve a significant increase in listening volume while the leakage volume is basically unchanged (the increase in listening volume is greater than the increase in leakage volume).
  • the sound leakage reduction effect of the dual-point sound source becomes weaker.
  • the main objective is to reduce the sound leakage.
  • the acoustic output device 100 may further include an acoustic driver 130.
  • the acoustic driver 130 outputs sound from the two third sound guide holes.
  • the acoustic driver 130 and the acoustic driver 120 may respectively output sounds of different frequencies.
  • the controller is used to make the acoustic driver 120 output sound in a first frequency range, and make the acoustic driver 130 output sound in a second frequency range, wherein the second frequency range includes The frequency of the frequency range.
  • the range of the first frequency is 100 Hz-1000 Hz
  • the range of the second frequency is 1000 Hz-10000 Hz.
  • the sound in the overlapping frequency range can be regarded as being output from the first sound guide hole, the second sound guide hole and the two third sound guide holes.
  • the acoustic driver 120 is a low frequency speaker, and the acoustic driver 130 is a mid-to-high frequency speaker. Due to the different frequency response characteristics of low frequency speakers and mid-to-high frequency speakers, the output sound frequency bands will also be different. By using low frequency speakers and mid-to-high frequency speakers, the high and low frequency sounds can be divided, and then the low frequency can be constructed separately. Double-point sound source and mid-high frequency double-point sound source are used for near-field sound output and far-field leakage reduction.
  • the acoustic driver 120 may provide a two-point sound source that outputs low-frequency sound through the sound guide hole 111 and the sound guide hole 112, and is mainly used to output sound in the low frequency band.
  • Low-frequency dual-point sound sources can be distributed on both sides of the auricle to increase the volume near the ear in the near field.
  • the acoustic driver 130 can provide a double-point sound source outputting a mid-to-high frequency band through the two third sound guide holes, and can reduce the mid-to-high frequency sound leakage by controlling the distance between the two third sound guide holes.
  • the mid-to-high frequency dual-point sound source can be distributed on both sides of the auricle, or on the same side of the auricle.
  • the acoustic driver 120 may provide a two-point sound source outputting full-frequency sound through the sound guide hole 111 and the sound guide hole 112 to further increase the volume of the near-field sound.
  • FIG. 41 is a diagram of the leakage index under the combined action of a low-frequency two-point sound source and a high-frequency two-point sound source provided according to some embodiments of the present application. As shown in Figure 41, by setting two sets of low-frequency dual-point sound sources and high-frequency dual-point sound sources with different spacings, a stronger leakage reduction ability than single-point sound sources can be obtained.
  • the low frequency range after adjusting the distance between the low-frequency two-point sound sources (for example, expanding the distance), the increase in listening sound is greater than the increase in the leakage volume, which can achieve a higher volume output of the acoustic output device in the low frequency range.
  • the low-frequency dual-point sound source since in the low frequency range, the low-frequency dual-point sound source has very little leakage. After adjusting the distance between the low-frequency dual-point sound sources (expanding the spacing), the slightly increased leakage can still be kept at a low level ( ⁇ value). It can be reduced even further).
  • the high frequency range by adjusting the sound source spacing (reducing the spacing), the problem of too low cut-off frequency of high-frequency leakage sound and too narrow audio frequency band of leakage reduction is overcome. It has a stronger sound leakage reduction effect in higher frequency bands, meeting the needs of open binaural acoustic output devices.
  • the total drop leakage curve shown in FIG. 41 is an ideal situation, and is only for explaining the principle effect.
  • the total leakage reduction curve is also affected by the actual circuit filter characteristics, transducer frequency characteristics, sound channel frequency characteristics and other factors.
  • the actual output low-frequency and high-frequency sound will be different from the above figure.
  • low-frequency and high-frequency sounds will have a certain overlap (aliasing) in the frequency bands near the crossover point, causing the total drop leakage to not have a sudden change at the crossover point as shown in the above figure, but near the crossover point
  • the frequency bands have gradual changes and transitions, as indicated by the thin solid line in Figure 41.
  • the two third sound guide holes can output sounds with a phase difference.
  • the two third sound guide holes output sounds with opposite phase differences.
  • the acoustic driver 130 outputting the sound with phase difference from the third sound guide hole reference may be made to the specific description of the acoustic driver 120 outputting sound from the sound guide hole.
  • FIG. 42 is a schematic diagram of a mobile phone with sound guide holes according to some embodiments of the present application.
  • the top 4220 of the mobile phone 4200 (that is, "perpendicular" to the upper end surface of the mobile phone display) is provided with a plurality of sound guide holes as described elsewhere in this application.
  • the sound guide hole 4201 may constitute a group of two-point sound sources (or a point sound source array) for outputting sound.
  • the first sound guide hole of the sound guide holes 4201 may be close to the left end of the top 4220, and the second sound guide hole may be close to the right end of the top 4220, and the two sound guide holes are separated by a certain distance.
  • An acoustic driver 4230 is provided inside the housing of the mobile phone 4200. The sound generated by the acoustic driver 4230 can be transmitted outward through the sound guide hole 4201.
  • the two sound guide holes 4201 can emit a group of sounds with the same phase (or approximately the same) and the same (or approximately the same) amplitude.
  • the sound guide holes 4201 can be located on both sides of the user’s ears. According to other embodiments in this application, it is equivalent to adding two sound guide holes to the user’s ears.
  • the sound path difference is so that the sound guide hole 4201 can emit strong near-field sound to the user.
  • the user's ears have little effect on the sound radiated by the sound guide hole 4201 in the far field, so that the sound guide hole 4201 can reduce sound leakage to the surrounding environment due to the cancellation of sound interference.
  • the space required for setting the sound guide hole on the front of the mobile phone can be saved, thereby further increasing the area of the front display of the mobile phone. It can also make the appearance of the mobile phone more concise and beautiful.
  • the above description of the sound guide holes on the mobile phone is only for illustrative purposes. Those skilled in the art can adjust the above structure without violating the principle, and the adjusted structure is still Within the protection scope of this application.
  • all or part of the sound guide hole 3201 can also be set in other positions of the mobile phone 4200, and these settings can still ensure that the user hears a louder volume when receiving voice information, while also avoiding the leakage of voice information to the surrounding environment.
  • the first sound guide hole may be arranged on the top 4220 (closer to the user's ear), and the second sound guide hole may be arranged on the back or side of the mobile phone 4200 (further away from the user's ear).
  • the shell of the mobile phone 4200 is equivalent to a “baffle” between the second sound guide hole and the user’s ear, adding a second sound guide hole.
  • the acoustic path from the two sound guide holes to the user's ears can increase the volume of the user's ears.
  • the housing of the mobile phone 4200 may also be provided with acoustic drivers that output sounds in different frequency ranges. The sound guide holes corresponding to these acoustic drivers are provided with or without baffles in the manner described above.
  • the sound guide holes of the acoustic output device are not limited to the two sound guide holes 111 and 112 corresponding to the acoustic driver 120 distributed on both sides of the auricle and the two third guide holes corresponding to the acoustic driver 130.
  • the sound holes are distributed on the front side of the auricle.
  • the two third sound guide holes corresponding to the acoustic driver 130 may be distributed on the same side of the auricle (for example, the back side, above, or below the auricle).
  • the two third sound guide holes corresponding to the acoustic driver 130 may be distributed on both sides of the auricle.
  • the two sound guide holes 111, the sound guide hole 112 or/and the two third sound guide holes are located on the same side of the auricle, between the two sound guide holes 111 and the sound guide hole 112 or/and the two A baffle can be arranged between the third sound guide holes to further increase the listening volume in the near field and reduce the problem of far-field sound leakage.
  • the two sound guide holes corresponding to the acoustic driver 120 may also be located on the same side of the auricle (for example, the front side, the back side, the upper side, and the lower side of the auricle).
  • this application uses specific words to describe the embodiments of the application.
  • “one embodiment”, “an embodiment”, and/or “some embodiments” mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that “one embodiment” or “one embodiment” or “an alternative embodiment” mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. .
  • some features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.
  • the computer storage medium may contain a propagated data signal containing a computer program code, for example on a baseband or as part of a carrier wave.
  • the propagation signal may have multiple manifestations, including electromagnetic forms, optical forms, etc., or a suitable combination.
  • the computer storage medium may be any computer readable medium other than the computer readable storage medium, and the medium may be connected to an instruction execution system, device, or device to realize communication, propagation, or transmission of the program for use.
  • the program code located on the computer storage medium can be transmitted through any suitable medium, including radio, cable, fiber optic cable, RF, or similar medium, or any combination of the above medium.
  • the computer program codes required for the operation of each part of this application can be written in any one or more programming languages, including object-oriented programming languages such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python Etc., conventional programming languages such as C language, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages such as Python, Ruby and Groovy, or other programming languages.
  • the program code can run entirely on the user's computer, or run as an independent software package on the user's computer, or partly run on the user's computer and partly run on the remote computer, or run entirely on the remote computer or server.
  • the remote computer can be connected to the user's computer through any form of network, such as a local area network (LAN) or a wide area network (WAN), or to an external computer (for example, via the Internet), or in a cloud computing environment, or as a service Use software as a service (SaaS).
  • LAN local area network
  • WAN wide area network
  • SaaS service Use software as a service

Abstract

La présente invention concerne un dispositif de sortie acoustique. Le dispositif de sortie acoustique peut comprendre au moins un circuit d'attaque acoustique, et le son produit par le ou les pilotes acoustiques est délivré par au moins deux trous de guidage de son. Le dispositif peut en outre comprendre un dispositif de commande, configuré pour commander la phase et l'amplitude de chacun du ou des pilotes acoustiques, et le dispositif de commande permet, au moyen d'un signal de commande, au ou aux circuit(s) d'attaque acoustiques d'émettre des sons ayant des phases opposées à partir des deux trous ou plus de guidage de son. Le dispositif comprend en outre une structure de support, la structure de support étant pourvue d'au moins un déflecteur, la structure de support étant configurée pour supporter le ou les dispositifs d'entraînement acoustiques, et lesdits deux trous ou plus de guidage de son sont respectivement situés de part et d'autre dudit ou desdits déflecteur(s).
PCT/CN2019/130942 2019-04-30 2019-12-31 Dispositif de sortie acoustique WO2020220723A1 (fr)

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US17/320,259 US11457301B2 (en) 2019-04-30 2021-05-14 Acoustic output apparatus
US17/931,082 US11671738B2 (en) 2019-04-30 2022-09-09 Acoustic output apparatus
US18/314,170 US20230276161A1 (en) 2019-04-30 2023-05-09 Acoustic output apparatus

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CN201910364346.2 2019-04-30
CN201910364346 2019-04-30
CN201910888067.6 2019-09-19
CN201910888762.2 2019-09-19
CN201910888762 2019-09-19
CN201910888067 2019-09-19

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US17/320,259 Continuation US11457301B2 (en) 2019-04-30 2021-05-14 Acoustic output apparatus

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PCT/CN2019/130880 WO2020220719A1 (fr) 2014-01-06 2019-12-31 Dispositif de sortie acoustique
PCT/CN2019/130942 WO2020220723A1 (fr) 2019-04-30 2019-12-31 Dispositif de sortie acoustique
PCT/CN2019/130886 WO2020220721A1 (fr) 2019-04-30 2019-12-31 Dispositif de sortie acoustique
PCT/CN2019/130884 WO2020220720A1 (fr) 2014-01-06 2019-12-31 Appareil de sortie acoustique
PCT/CN2019/130944 WO2020220724A1 (fr) 2014-01-06 2019-12-31 Appareil de sortie acoustique
PCT/CN2019/130921 WO2020220722A1 (fr) 2019-04-30 2019-12-31 Dispositif de sortie acoustique
PCT/CN2020/070550 WO2020220737A1 (fr) 2019-04-30 2020-01-06 Système de réduction de bruit de microphone et lunettes intelligentes l'utilisant
PCT/CN2020/070542 WO2020220735A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique
PCT/CN2020/070545 WO2020220736A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique et assemblage de celui-ci
PCT/CN2020/070551 WO2020220738A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique et bouton associé
PCT/CN2020/070540 WO2020220734A1 (fr) 2019-04-30 2020-01-06 Lunettes audio
PCT/CN2020/070539 WO2020220733A1 (fr) 2014-01-06 2020-01-06 Écouteur sans blocage des oreilles
PCT/CN2020/083631 WO2020220947A1 (fr) 2011-12-23 2020-04-08 Appareil de sortie acoustique et procédé associé
PCT/CN2020/084161 WO2020220970A1 (fr) 2011-12-23 2020-04-10 Appareil de sortie acoustique et procédés associés
PCT/CN2020/087002 WO2020221163A1 (fr) 2011-12-23 2020-04-26 Appareil de sortie acoustique et procédé associé
PCT/CN2020/087034 WO2020221169A1 (fr) 2014-01-06 2020-04-26 Dispositif acoustique
PCT/CN2020/087526 WO2020221254A1 (fr) 2011-12-23 2020-04-28 Dispositif de sortie acoustique
PCT/CN2020/088482 WO2020221359A1 (fr) 2011-12-23 2020-04-30 Écouteur ouvert
PCT/CN2020/088190 WO2020221337A1 (fr) 2019-04-30 2020-04-30 Appareil de sortie acoustique et appareil de réduction de bruit et de transmission de son

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PCT/CN2019/130886 WO2020220721A1 (fr) 2019-04-30 2019-12-31 Dispositif de sortie acoustique
PCT/CN2019/130884 WO2020220720A1 (fr) 2014-01-06 2019-12-31 Appareil de sortie acoustique
PCT/CN2019/130944 WO2020220724A1 (fr) 2014-01-06 2019-12-31 Appareil de sortie acoustique
PCT/CN2019/130921 WO2020220722A1 (fr) 2019-04-30 2019-12-31 Dispositif de sortie acoustique
PCT/CN2020/070550 WO2020220737A1 (fr) 2019-04-30 2020-01-06 Système de réduction de bruit de microphone et lunettes intelligentes l'utilisant
PCT/CN2020/070542 WO2020220735A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique
PCT/CN2020/070545 WO2020220736A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique et assemblage de celui-ci
PCT/CN2020/070551 WO2020220738A1 (fr) 2019-04-30 2020-01-06 Dispositif de sortie acoustique et bouton associé
PCT/CN2020/070540 WO2020220734A1 (fr) 2019-04-30 2020-01-06 Lunettes audio
PCT/CN2020/070539 WO2020220733A1 (fr) 2014-01-06 2020-01-06 Écouteur sans blocage des oreilles
PCT/CN2020/083631 WO2020220947A1 (fr) 2011-12-23 2020-04-08 Appareil de sortie acoustique et procédé associé
PCT/CN2020/084161 WO2020220970A1 (fr) 2011-12-23 2020-04-10 Appareil de sortie acoustique et procédés associés
PCT/CN2020/087002 WO2020221163A1 (fr) 2011-12-23 2020-04-26 Appareil de sortie acoustique et procédé associé
PCT/CN2020/087034 WO2020221169A1 (fr) 2014-01-06 2020-04-26 Dispositif acoustique
PCT/CN2020/087526 WO2020221254A1 (fr) 2011-12-23 2020-04-28 Dispositif de sortie acoustique
PCT/CN2020/088482 WO2020221359A1 (fr) 2011-12-23 2020-04-30 Écouteur ouvert
PCT/CN2020/088190 WO2020221337A1 (fr) 2019-04-30 2020-04-30 Appareil de sortie acoustique et appareil de réduction de bruit et de transmission de son

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EP (3) EP3952336A4 (fr)
JP (4) JP2022531254A (fr)
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EP3942844A1 (fr) 2022-01-26
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EP3952336A1 (fr) 2022-02-09
EP3952331A4 (fr) 2022-05-18
WO2020220737A1 (fr) 2020-11-05
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WO2020220724A1 (fr) 2020-11-05
KR20220017905A (ko) 2022-02-14
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US20210168498A1 (en) 2021-06-03
JP2022531254A (ja) 2022-07-06
US11838712B2 (en) 2023-12-05

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